Wearing red increases attraction.
30
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
27
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130